Finding a Flux by Application

The following table is an easy-to-use chart that helps you find the right flux for your application. We have many fluxes in addition to those that appear in the chart below. If you need assistance, Contact Us. If you aren’t sure of the part number, or would like to view additional options, please use the following resources:

How to Find the Right Flux – An easy-to-follow guide that helps you understand and choose fluxes.

Find a Flux by Name – A chart that lets you find more information about a flux when you already know the part number.

Find a Flux by Specification – A chart that lists fluxes per various industry and/or government specifications.

Flux by Application – Easy-to-use flux table that matches fluxes with applications.

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Process	Metal / Application	Additional Info.	Solder / Braze Alloy	Temperatures	Link	Recommendation

Process	Metal / Application	Additional Info.	Solder / Braze Alloy	Temperatures	Link	Recommendation
Soldering	Aluminum	Low Temp	Tin-Based	177 - 288¡C 350 - 550¡F	Aluminum Soldering Flux	No. 1261
Soldering	Aluminum	High Temp	Zinc-Aluminum	345 - 425¡C 650 - 800¡F	Aluminum Soldering Flux	No. 1280
Brazing	Aluminum Brazing	Torch Brazing	4047/718, 4145/716	345 - 690¡C 650 - 1275¡F	Aluminum Brazing Flux	No. 20
Brazing	Aluminum Brazing	Controlled Atmosphere Brazing	Silicon Aluminum	580 - 610¡C 1076 - 1130¡F	Aluminum Brazing Flux	No. 1250
Brazing	Aluminum Bronze Brazing	Torch Brazing	Silver-Bearing Braze Alloys (BAg)	580 - 610¡C 1076 - 1130¡F	Aluminum Bronze Brazing Flux	No. 625
Welding	Aluminum Welding Flux	Oxy-Acetlyne Torch	1100-Series, Aluminum Filler Rod	570 - 700¡C 1050 - 1300¡F	Aluminum Welding Flux	Anti-Borax No. 8
Soldering	Battery Cast-on-Strap	Lead Batteries	Lead-Based	260 - 455¡C 500 - 850¡F	Battery CoS Fluxes	See Web Page
Soldering	BGA Attachment: Tacky Flux	Tacky Flux: No-Clean and Water-Soluble	Tin-Based	120 - 400¡C 250 - 750¡F	Tacky Flux: BGA Assembly	See various tacky fluxes
Brazing	Borate-Free Brazing Flux	Torch/Furnace Brazing	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	485 - 870¡C 900 - 1600¡F	Borate Free Brazing Flux	No. 670
Brazing	Boric Acid Free Brazing Flux	Torch/Furnace Brazing	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	485 - 870¡C 900 - 1600¡F	Boric Acid Free Brazing Flux	No. 6, No. 601FP
Soldering	Brass	Brass-to-Brass, Brass-to-Copper	Tin-Based	260 - 425¡C 500 - 800¡F	Brass Soldering Flux	No. 90, No. 90-Paste, No. 520B
Brazing	Bronze Brazing Flux Powder	Low Fuming Bronze	BAg, BCu, BNi, BAu, RBCuZn	760 - 1205¡C 1400 - 2200¡F	Bronze Brazing Powder Flux	Anti-Borax No. 2
Brazing	Carbide Brazing	For large and small carbide parts	Nickel Braze Alloys	760 - 1205¡C 1400 - 2200¡F	Carbide Brazing Flux	No. 609LB, No. 612
Welding	Cast Iron Welding Flux	Cast Iron	n/a	815 - 1540¡C 1500 - 2900¡F	Cast Iron Welding Flux	Anti-Borax No. 1
Soldering	Component Lead Tinning	Copper	Tin-Based	95 - 315¡C 200 - 600¡F	Component Lead Tinning	No. 30, No. 45
Soldering	Component Lead Tinning	Nickel	Tin-Based	95 - 315¡C 200 - 600¡F	Component Lead Tinning	No. 40MM4, No. 45DSA
Soldering	Component Lead Tinning	Halogen-Free	Tin-Based	200 - 280¡C 390 - 540¡F	Component Lead Tinning	No. 430MB, No. 435 (3:1)
Soldering	Copper	General Purpose, Safer Flux	Tin-Based	95 - 315¡C 200 - 600¡F	Superior Supersafe	No. 30
Soldering	Copper - Badly Oxidized	Inorganic Acid flux	Tin-Based	95 - 345¡C 200 - 650¡F	Copper Soldering Flux	No. 75, No. 130
Soldering	Copper Pipes - Plumbing	Petroleum Based	Tin-Based	93 - 315¡C 200 - 600¡F	Plumbing Fluxes	No. 130
Soldering	Copper Pipes - Plumbing	Water-Soluble (ASTM B-813)	Tin-Based	93 - 315¡C 200 - 600¡F	Plumbing Fluxes	No. 141
Soldering	Copper-Brass Radiator	Copper, Brass	Tin-Based	See Web Page	Radiator Fluxes	Fluxes for all parts of copper-brass radiators
Soldering	Core Fluxes	For making cored solder wire	See Web Page	See Web Page	Solder Core Flux	See choices
Soldering	Dross Reducer Powder	Reduces Dross Waste	Tin-Based	235 - 260¡C 455 - 500¡F	Dross Reducer Powder	Dross Reducer Powder
Soldering	Electronics Wire Tinning	Copper, Nickel	Tin-Based	200 - 280¡C 390 - 540¡F	Electronics Wire Tinning	No. 30, No. 45
Soldering	Electronics Wire Tinning	No-Clean	Tin-Based	200 - 270¡C 390 - 520¡F	Electronics Wire Tinning	No. 334
Brazing	Fluoride-Free Brazing Flux	Torch/Furnace Brazing	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	685 - 980¡C 1270 - 1800¡F	Fluoride-Free Brazing Flux	No. 650
Welding	Forge Welding Flux Powder	Ferrous Alloys	n/a	Welding Temps	Forge Welding Flux Powder	See selection.
Soldering	Galvanized Steel	Also good for Zinc	Tin/Lead	95 - 425¡C 200 - 800¡F	Galvanized Steel Soldering Flux	No. 71
Brazing	Hi-Temp Silver Brazing	"Black Flux" - Boron Modified	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	565 - 980¡C 1050 - 1800¡F	Hi-Temp Black Silver Brazing Flux	No. 601B/3411
Soldering	Hot Air Leveling Flux	PCB Fabrication	Tin-Based	Per heat cycle	Hot Air Leveling Flux	HASL-1
Soldering	Industrial Continous Wire & Strip Tinning	Copper, Steel, Brass	Tin-Based	See Web Page	Wire and Strip Tinning	Fluxes for various gages and alloys
Brazing	Jewelry Brazing Flux	Bifluoride-Free	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	485 - 870¡C 900 - 1600¡F	Jewelry Brazing Flux	No. 6
Brazing	Liquid Brazing Flux	Torch/Furnace Brazing	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	590 - 870¡C 1095 - 1600¡F	Liquid Brazing Flux	No. 25, No. 29
Brazing	Magnesium Brazing Flux	Torch, Oven, Induction Brazing	Magnesium Brazing Alloys	480 - 620¡C 900 - 1150¡F		No. 21
Soldering	Nickel	Organic Acid	Tin-Based	95 - 315¡C 200 - 600¡F	Component Lead Tinning	No. 40MM4, No. 45
Soldering	PCB Repair Flux	Tacky Flux	Tin-Based	120 - 400¡C 250 - 750¡F	Tacky Flux: BGA Assembly	No. 3000, No. 9000
Soldering	PCB Repair Flux	Rosin Flux - Type RMA	Tin-Based	200 - 260¡C 390 - 500¡F	PCB Repair Flux	No. 99
Soldering	PCB Repair Flux	Water-Soluble Gel Flux/Cleaner	Tin-Based	95 - 315¡C 200 - 600¡F	PCB Repair Flux	Sybergel
Soldering	PCB Selective Soldering	No-Clean, VOC-Free	Tin-Based	200 - 350¡C 390 - 660¡F	Selective Soldering Flux	SSF-NC50
Soldering	PCB Selective Soldering	No-Clean, Alcohol-Based	Tin-Based	200 - 350¡C 390 - 660¡F	Selective Soldering Flux	SSF-NC400
Soldering	PCB Selective Soldering	Water-Soluble	Tin-Based	200 - 350¡C 390 - 660¡F	Selective Soldering Flux	SSF-WS800
Soldering	PCB Selective Soldering	Rosin Flux - Type RMA	Tin-Based	200 - 350¡C 390 - 660¡F	Selective Soldering Flux	SSF-RMA20
Soldering	PCB Selective Soldering	Tinning of Solder Nozzle	Tin-Based	95 - 350¡C 200 - 660¡F	Selective Soldering Flux	No. 75, No. 23
Soldering	PCB Wave Solder	Water-Soluble	Tin-Based	200 - 315¡C 390 - 600¡F	PCB Wave Soldering Flux	No. 80, No. 84
Soldering	PCB Wave Solder	No-Clean, Alcohol, (2% Solids)	Tin-Lead	200 - 270¡C 390 - 520¡F	PCB Wave Soldering Flux	No. 312
Soldering	PCB Wave Solder	No-Clean, Alcohol, (3% Solids)	Lead-Free	200 - 270¡C 390 - 520¡F	PCB Wave Soldering Flux	No. 325
Soldering	PCB Wave Solder	No-Clean, Alcohol, (4% Solids)	Lead-Free	200 - 270¡C 390 - 520¡F	PCB Wave Soldering Flux	No. 315LF
Soldering	PCB Wave Solder	No-Clean, VOC-Free (2% Solids)	Tin-Lead	200 - 270¡C 390 - 520¡F	PCB Wave Soldering Flux	No. 420F
Soldering	PCB Wave Solder	No-Clean, VOC-Free (4% Solids)	Lead-Free	200 - 270¡C 390 - 520¡F	PCB Wave Soldering Flux	No. 420F-LF
Soldering	Preform Coating Flux	No-Clean & Water-Soluble	See Web Page	See Web Page	Preform Coating Flux	See choices
Soldering	Roof Soldering	Copper or Steel	Tin/Lead	95 - 315¡C 200 - 600¡F	Roof Solder Flux	RubyFluid Flux
Soldering	Rosin Flux	Type R	Tin-Based	200 - 260¡C 390 - 500¡F	Rosin Fluxes	No. 97
Soldering	Rosin Flux	Type RMA	Tin-Based	200 - 260¡C 390 - 500¡F	Rosin Fluxes	No. 99
Soldering	Rosin Flux	Type RMA - Paste	Tin-Based	200 - 260¡C 390 - 500¡F	Rosin Fluxes	No. 9000
Soldering	Rosin Flux	Type RA	Tin-Based	200 - 260¡C 390 - 500¡F	Rosin Fluxes	No. 100
Soldering	Rosin Flux	Type RA - High Temp	Tin-Based	200 - 450¡C 390 - 840¡F	Rosin Fluxes	No. 100HT
Brazing	Silver Brazing or Silver Solder	White Flux Paste	Silver-Bearing Braze Alloys (BAg), Phos-Copper (BCuP)	565 - 870¡C 1050 - 1600¡F	Silver Brazing White Paste Flux	No. 601
Soldering	SMT PCB Boards: Solder Paste	Solder Paste: No-Clean and Water-Soluble	Lead-Free, Lead Bearing	200 - 260¡C 390 - 500¡F	SMT Solder Paste	See various pastes
Soldering	Solder Paste (Surface Mount)	No-Clean	SAC305, Type 3	Liquidus: 217C/423F Max: 250C/482F	No-Clean Solder Paste, SAC305, Type 3	592-63-885 (Jars, Cartridges); 592-63-86 (Syringes)
Soldering	Solder Paste (Surface Mount)	No-Clean	SAC305, Type 4	Liquidus: 217C/423F Max: 250C/482F	No-Clean Solder Paste, SAC305, Type 4	592-64-825 (Jars, Cartridges); 592-64-86 (Syringes)
Soldering	Solder Paste (Surface Mount)	No-Clean	SAC305, Type 5	Liquidus: 217C/423F Max: 250C/482F	No-Clean Solder Paste, SAC305, Type 5	592-65-88 (Jars, Cartridges); 592-65-86 (Syringes)
Soldering	Solder Paste (Surface Mount)	No-Clean	Sn96.5/Ag3.5, Type 3	Liquidus: 221C/430F Max: 250C/482F	No-Clean Solder Paste, Sn96.5/Ag3.5, Type 3	592-33-885 (Jars, Cartridges); 592-33-86 (Syringes)
Soldering	Soldering Salts	Bare Copper, Cast Iron Babbitt	Tin/Lead, Tin/Antimony	130 - 500¡C 265 - 930¡F	Soldering Salts & Babbitt Flux	Tara 350
Soldering	Stained Glass	Copper Foil	Tin-Based	95 - 315¡C 200 - 600¡F	Stained Glass	No. 30 or RubyFluid
Soldering	Stainless Steel	Active Flux Required	Tin-Based	95 - 425¡C 200 - 800¡F	Stainless Steel Soldering Flux	No. 71
Welding	Stainless Steel Backup Flux	Stainless Steel, High-Chromium Ferrous & Low-Nickel Alloys	n/a	1090 - 1540¡C 2000 - 2900¡F	Stainless Steel Backup Flux	No. 9H
Brazing	Titanium Brazing Flux	Torch, Oven, Induction Brazing	BAg 34	650 - 760¡C 1200 - 1400¡F	Titanium Brazing Flux	TiBF-16
Soldering	Zinc Metal	Inorganic Acid flux	Tin-Based	260 - 425¡C 500 - 800¡F	Soldering Flux for Zinc Metal	No. 71 Paste, No. 71

Showing 1 to 69 of 69 entries

Finding a Flux by Application

Flux by Application – Easy-to-use flux table that matches fluxes with applications.

Superior Flux & MFG. Co.

Finding a Flux

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